Numerical Simulation Of Incompressible
Laminar Fluid Flow In Tubes With Wire Coil
Inserts
Author(s)
D. Muñoz-Esparza, J. Pérez-García, E. Sanmiguel-Rojas,
A. García-Pinar & J. P. Solano-Fernández
Abstract
Numerical simulations of steady incompressible laminar 3D fluid flow with heat
transfer in smooth round tubes with wire coil inserts have been accomplished.
Four wire coils with different geometrical characteristics of dimensionless pitch
(p/d) and wire-diameter (e/d) have been studied for Reynolds numbers lower
than 500–700 using the commercial package software FLUENT.
The numerical results have been compared with experimental data previously
obtained by the authors and a good agreement is reached. These results allow
one to know the internal flow structure, to identify the critical Reynolds number
of oscillating laminar flow and to obtain practical correlations of the Fanning
friction factor. So, the internal flow structure under isothermal conditions has
been analyzed and a set of practical correlations of Fanning friction factor have
been obtained. The heat transfer enhancement produced by the insertion of
helical-wire-coils has also been treated. The preliminary results obtained for
uniform heat flux are showed. The developed numerical methodology can be
used to assess the heat transfer enhancement produced by other kinds of insert
devices, to reduce the experimental efforts and to obtain more reliable
correlations for heat exchangers design process.
Keywords: wire coil inserts, pressure drop, heat transfer enhancement, heat
exchangers.
Keywords
wire coil inserts, pressure drop, heat transfer enhancement, heat
exchangers.
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